Another very healthy green (surprise!), mustard greens pack a whallop with lots of vitamins A, C, and E as well as folate. These are the greens that produce the seeds used to make dijon mustard. Expect a strong, peppery flavor. Young greens can be added to salads or sautée them like you would any other dark leafy green.
Mustard Greens (Mixed)
Potomac Vegetable Farms 